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公开(公告)号：US10680628B2
公开(公告)日：2020-06-09
申请号：US16142044
申请日：2018-09-26
Applicant: Seiko Epson Corporation
Inventor： Tetsuo Nishida
IPC: H01S1/06 , H03B17/00 , H03L7/26 , H03L1/04 , H01S5/024 , G01K7/22 , H01S5/183 , G01K7/02 , H01S5/068 , H01S5/0687 , H01S5/022
Abstract: An atomic oscillator includes a semiconductor laser housed in a container, an atom cell housing alkali metal atoms and irradiated with a light output from the semiconductor laser, a light receiving element that detects an intensity of the light transmitted through the atom cell and outputs a detection signal, a temperature sensor housed in the container, a first temperature control element housed in the container and controlled based on output of the temperature sensor, and a second temperature control element housed in the container and controlled based on the detection signal. A distance between the second temperature control element and the semiconductor laser is smaller than a distance between the first temperature control element and the semiconductor laser.
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公开(公告)号：US10184808B2
公开(公告)日：2019-01-22
申请号：US15493817
申请日：2017-04-21
Applicant: Seiko Epson Corporation
Inventor： Hiroto Tomioka , Tetsuo Nishida
Abstract: An encoder includes an optical scale that is so provided as to be pivotable around a pivotal axis and includes a polarizing portion having a polarization characteristic, a light outputting portion that outputs linearly polarized light toward the polarizing portion, and a light detecting portion that detects the linearly polarized light from the optical scale. The light outputting portion includes a vertical cavity surface emitting laser, and light emitted from the vertical cavity surface emitting laser spreads at an angle greater than or equal to 5° but smaller than or equal to 20°.
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公开(公告)号：US09748739B2
公开(公告)日：2017-08-29
申请号：US15093990
申请日：2016-04-08
Applicant: Seiko Epson Corporation
Inventor： Tsuyoshi Kaneko , Tetsuo Nishida , Yuji Kurachi
CPC classification number: H01S5/18333 , G04F5/145 , H01S5/0425 , H01S5/18311 , H01S5/18313 , H01S5/18344 , H01S5/1835 , H01S5/18352 , H01S5/18361 , H01S5/187 , H01S5/2213 , H01S5/34313 , H03L7/26
Abstract: A vertical cavity surface emitting laser includes: a substrate; a first mirror layer; an active layer; a second mirror layer; a current constriction layer; a first area connected to the first mirror layer and including a plurality of oxide layers; and a second area connected to the second mirror layer and including a plurality of oxide layers. The first mirror layer, the active layer, the second mirror layer, the current constriction layer, the first area, and the second area configure a laminated body. The laminated body includes a first portion, a second portion, and a third portion between the first portion and the second portion. When a width of the oxide area is W1 and a width of an upper surface of the first portion is W2, W2/W1≦3.3.
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公开(公告)号：US08878617B2
公开(公告)日：2014-11-04
申请号：US13737449
申请日：2013-01-09
Applicant: Seiko Epson Corporation
Inventor： Tetsuo Nishida
CPC classification number: H03L7/26 , G01R33/44 , G04F5/145 , G21K1/006 , H01S5/0427 , H01S5/0687
Abstract: An optical module for an atomic oscillator using a quantum interference effect includes a light source part to emit resonant light having two different wavelengths, a gas cell in which an alkali metal atom gas is enclosed and to which the resonant light is irradiated, a light detection part to detect an intensity of the resonant light transmitted through the gas cell, and a gas-flow generation part to generate a flow of the alkali metal atom gas.
Abstract translation: 用于使用量子干涉效应的原子振荡器的光学模块包括发射具有两个不同波长的共振光的光源部分，封闭有碱金属原子气体并且共振光被照射的气室，光检测 检测透过气室的共振光的强度的部分，以及产生碱金属原子气体流的气流产生部。
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公开(公告)号：US09711946B2
公开(公告)日：2017-07-18
申请号：US14576837
申请日：2014-12-19
Applicant: Seiko Epson Corporation
Inventor： Tsuyoshi Kaneko , Tetsuo Nishida , Yuji Kurachi
CPC classification number: H01S5/183 , G04F5/145 , H01S5/0425 , H01S5/18311 , H01S5/18347 , H01S5/1835 , H01S5/18352 , H01S5/18355 , H01S5/18372 , H01S5/3201 , H01S2301/176
Abstract: A vertical cavity surface emitting laser includes: a substrate; a laminated body which is provided over the substrate; and a resin layer which is provided on at least a side surface of the laminated body, wherein the laminated body at least includes a first mirror layer provided over the substrate, an active layer provided over the first mirror layer, and a second mirror layer provided over the active layer, in a plan view, a length of the laminated body in a first direction is greater than a length of the laminated body in a second direction orthogonal to the first direction, and in the plan view, a length of the resin layer in the first direction is greater than a length of the resin layer in the second direction.
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Patent Agency Ranking
公开(公告)号：US09360845B2
公开(公告)日：2016-06-07
申请号：US14573293
申请日：2014-12-17
Applicant: Seiko Epson Corporation
Inventor： Tsuyoshi Kaneko , Tetsuo Nishida , Yuji Kurachi
CPC classification number: H01S5/187 , G04F5/145 , H01S5/0421 , H01S5/0425 , H01S5/18313 , H01S5/18333 , H01S5/1835 , H01S5/18352 , H01S5/3432 , H03L7/26
Abstract: A vertical cavity surface emitting laser includes: a substrate; and a laminated body which is provided over the substrate, wherein the laminated body includes a first mirror layer provided over the substrate, an active layer provided over the first mirror layer, and a second mirror layer provided over the active layer, in a plan view, the laminated body includes a first portion having a first width, a second portion having a second width, and a third portion which is provided between the first portion and the second portion and has a third width wider than the first width or the second width, and a resin layer which covers at least one portion of the first portion is provided.
Abstract translation: 垂直腔表面发射激光器包括：衬底; 以及设置在所述基板上的层叠体，其中，所述层叠体包括设置在所述基板上的第一反射镜层，设置在所述第一反射镜层上的有源层，以及设置在所述有源层上的第二反射镜层， 层压体包括具有第一宽度的第一部分，具有第二宽度的第二部分和设置在第一部分和第二部分之间的第三部分，并且具有比第一宽度或第二宽度宽的第三宽度 并且设置覆盖第一部分的至少一部分的树脂层。
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公开(公告)号：US09258002B2
公开(公告)日：2016-02-09
申请号：US13737613
申请日：2013-01-09
Applicant: Seiko Epson Corporation
Inventor： Tetsuo Nishida
Abstract: An optical module for an atomic oscillator using a quantum interference effect includes a first light source unit that emits first resonance light, a gas cell in which an alkali metal atom is sealed, a first light detection unit that detects the intensity of the first resonance light having passed through the gas cell, a determination unit that determines whether or not the first light source unit has failed, a second light source unit that irradiates the gas cell with second resonance light when the determination unit determines that the first light source unit has failed, and a second light detection unit that detects the intensity of the second resonance light having passed through the gas cell, and the optical path length of the first resonance light in the gas cell and the optical path length of the second resonance light in the gas cell are equal to each other.
Abstract translation: 用于使用量子干涉效应的原子振荡器的光学模块包括发射第一共振光的第一光源单元，密封有碱金属原子的气室，检测第一共振光的强度的第一光检测单元 已经通过所述气室，确定单元，其确定所述第一光源单元是否已经发生故障;第二光源单元，当所述确定单元确定所述第一光源单元已经失败时，以第二共振光照射所述气室 以及第二光检测单元，其检测通过气室的第二共振光的强度以及气室中的第一共振光的光路长度和气体中的第二共振光的光路长度 细胞彼此相等。
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公开(公告)号：US09257816B2
公开(公告)日：2016-02-09
申请号：US14574932
申请日：2014-12-18
Applicant: Seiko Epson Corporation
Inventor： Tetsuo Nishida
CPC classification number: H01S5/423 , G04F5/145 , H01S5/02276 , H01S5/0425 , H01S5/18311 , H01S5/1835 , H01S5/18352 , H01S5/18355 , H01S5/3201 , H01S5/34313 , H01S2301/176
Abstract: A vertical cavity surface emitting laser includes: a substrate; a first mirror layer; an active layer; a second mirror layer; a first electrode which is electrically connected to the first mirror layer; a second electrode which is electrically connected to the second mirror layer; and a pad which is electrically connected to the second electrode, in which the first mirror layer, the active layer, and the second mirror layer configure a laminated body, the laminated body includes a resonance portion, an insulation layer is provided on a side surface of the laminated body, in a plan view, the insulation layer has a shape line-symmetrical with respect to a virtual straight line passing through a center of the resonance portion, the pad is provided over the insulation layer, and in the plan view, the pad is only provided on one side of the virtual straight line.
Abstract translation: 垂直腔表面发射激光器包括：衬底; 第一镜层; 活性层 第二镜层; 电连接到第一镜层的第一电极; 电连接到第二镜层的第二电极; 以及与第二电极电连接的垫，其中第一镜层，有源层和第二镜层构成层叠体，层叠体包括共振部，绝缘层设置在侧面 在平面图中，绝缘层相对于穿过谐振部分的中心的虚拟直线具有对称的形状，该衬垫设置在绝缘层上方，并且在平面图中， 该垫仅设置在虚拟直线的一侧。
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公开(公告)号：US10103515B2
公开(公告)日：2018-10-16
申请号：US15148065
申请日：2016-05-06
Applicant: Seiko Epson Corporation
Inventor： Tsuyoshi Kaneko , Tetsuo Nishida , Yuji Kurachi
Abstract: A vertical cavity surface emitting laser includes: a substrate; and a laminated body which is provided over the substrate, wherein the laminated body includes a first mirror layer provided over the substrate, an active layer provided over the first mirror layer, and a second mirror layer provided over the active layer, in a plan view, the laminated body includes a first portion having a first width, a second portion having a second width, and a third portion which is provided between the first portion and the second portion and has a third width wider than the first width or the second width, and a resin layer which covers at least one portion of the first portion is provided.
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公开(公告)号：US09503111B2
公开(公告)日：2016-11-22
申请号：US14865102
申请日：2015-09-25
Applicant: Seiko Epson Corporation
Inventor： Tetsuo Nishida
Abstract: An atomic oscillator using a quantum interference effect, includes: a first light source unit emitting first light which includes a resonant light pair having two different wavelengths; a gas cell sealed with alkali metal atoms; a first light detection unit detecting a light intensity of the first light which is transmitted through the gas cell; a second light source unit emitting second light towards the gas cell; and a control unit changing a light intensity of the second light which is emitted from the second light source unit to compensate a change in the light intensity detected by the first light detection unit.
Abstract translation: 使用量子干涉效应的原子振荡器包括：发射包括具有两个不同波长的共振光对的第一光的第一光源单元; 用碱金属原子密封的气室; 第一光检测单元，检测透过气室的第一光的光强度; 向所述气室发射第二光的第二光源单元; 以及控制单元，其改变从所述第二光源单元发射的所述第二光的光强度，以补偿由所述第一光检测单元检测到的光强度的变化。
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